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Derivatives of basic trigonometric functions
y = sin(x)
y’ = cos(x)
y = cos(x)
y’ = -sin(x)
y = tan(x)
y’ = sec²x
y = cot(x)
y’ = -csc²x
y = sec(x)
y’ = sec(x)tan(x)
y = csc(x)
y = -csc(x)cot(x)
product rule
(fg)′=f′g+fg′
quotient rule
(fg)′=f′g−fg′/g2